export declare function ext_hint(filename: string | undefined, ext_regex: RegExp): boolean | null;
export declare const FORMAT_PATTERNS: {
    readonly ase: (data: unknown, filename?: string) => boolean;
    readonly hdf5: (data: unknown, filename?: string) => boolean;
    readonly vasp: (data: string, filename?: string) => boolean;
    readonly xyz_multi: (data: string, filename?: string) => boolean;
    readonly lammpstrj: (data: string, filename?: string) => boolean;
};
export declare function is_trajectory_file(filename: string, content?: string): boolean;